Proper lubrication steps are the vital to an excellent all-around maintenance program. If the oil is not doing its job, or if the oil level is ignored, all the maintenance measures in the people are not going to store the transmission running or assure lengthy transmission life.Eaton Fuller transobjectives are designed so that the inner parts operate in a bath of oil circulated by the motion of gears and also shafts.Therefore, all parts will certainly be amply lubricated if these actions are carefully followed:1. Maintain oil level. Inspect on a regular basis.2. Change oil consistently.3. Use the correct grade and also form of oil.4. Buy from a trustworthy dealer.

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Eaton Roadranger CD5O Transmission FluidHIGHWAY USE-Heavy Duty and also Mid.RangeHeavy Duty Highway Change IntervalMid.Range Highmeans Change IntervalOFF-HIGHWAY USEHeavy Duty Engine Lubricant or Mineral Gear LubricantHIGHWAY USEOFF-HIGHWAY USE
First 3,000 to 5,000 miles (4827 to 8045 Km)Factory fill, initial drain
Every 10,000 miles (16090 Km)Check fluid level Check for leaks
Eexceptionally 250,000 miles (402336 km)Change transmission fluid
Eincredibly 100,000 miles (160,000 Km) or eexceptionally 3 years whichever occurs firstChange transmission fluid
First 30 hoursFactory fill initial drain
Eexceptionally 40 hoursInspect fluid level, examine for leaks
Eextremely 500 hoursChange transmission fluid wbelow severe dirt conditions exist
Eexceptionally 1,000 hoursChange transmission fluid (Common off-highmethod use)
First 3,000 to 5,000 miles (4827 to 8045 Km)Factory fill, initial drain
Eextremely 10,000 miles (16090 Km)Inspect lubricant level, inspect for leaks
Eexceptionally 50,000 miles (80450 Km)Change transmission lubricant
First 30 hoursChange transmission lubricant on brand-new units
Eexceptionally 40 hoursInspect lubricant level, check for leaks
Every 500 hoursChange transmission lubricant where severe dirt conditions exist
Eincredibly 1,000 hoursChange transmission lubricant (Regular off-highmeans use)

TypeGrade (SAE)Fahrenheit(Celcius)Ambient TemperatureEaton Roadranger CD50 Transmission Fluid50All
Heavy Duty Engine OilMIL-L-2104B, C, or D orAPI-SF or API-CD(Previous API designations acceptable)504030Above 10°F (-12°C)Above 10°F (-12°C)Below 10°F (-12°C)
Minral Gear Oil withrust oxidationinhibitor API-GL-19080WAbove 10°F (-12°C)Below 10°F (-12°C)

The use of mild EP equipment oil or multifunction gear oil is not recommended, but if these gear oils are supplied, be sure to adhere to the adhering to limitations:Do not usage mild EP equipment oil or multipurpose gear oil as soon as operating temperatures are above 230ºF (110ºC). Many type of of these gear oils, particularly 85W140, break down above 230ºF and also coat seals, bearings and also gears through deposits that might reason premature failures. If these deposits are observed(especially a coating on seal areas bring about oil leakage), readjust to Eaton Roadranger CD5O transmission liquid, heavy duty engine oil or mineral equipment oil to ascertain maximum component life and also to preserve your warranty with Eaton.(Also check out “Operating Temperatures”.)Additives and also friction modifiers are not recommfinished for use in Eaton Fuller transmissions.

Ideal Oil Level

Make sure oil is level through filler opening. Since you can reach oil with your finger does not mean oil is at the correct level. One inch of oil level is about one gallon of oil.

Draining Oil

Drain transmission while oil is warmth. To drainpipe oil rerelocate the drain plug at the bottom of the situation. Clean the drainpipe plug prior to reinstalling.


Clean instance approximately filler plug and also remove the plug from side of the case. Fill transmission to the level of the filler opening. If the transmission has 2 filler openings, fill to level of both openings.The precise amount of oil will certainly depend on the transmission inclination and version. Do not overfill; this will reason oil to be forced out of the transmission.When including oil, kinds and also brands of oil need to not be mixed because of possible incompatibility.

Operating Temperatures


– With engines of 350 H.P. and over via overdrive transmission


– With engines 399 H.P. and above via overdrive transgoals and GCWs over 90,000 lbs.– With engines 399 H.P. and also over and 1400 Lbs.-Ft. or greater torque– With engines 450 H.P. and also above

With EP or Multipurpose Gear Oil

Mild EP gear oil and multipurpose equipment oil are not recommfinished when lubricant operating temperatures are over 230ºF (110ºC). In addition, transmission oil coolers are not recommended through these gear oils considering that the oil cooler products may be assaulted by these gear oils. The lower temperature limit and oil cooler restriction with these gear oils generally limit their success to milder applications.

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Ideal Lubrication Levels as Related to Transmission Installation AnglesIf the transmission operating angle is even more than 12 levels, improper lubrication have the right to happen. The operating angle is the transmission mounting angle in the chassis plus the percent of upgrade (expressed in degrees).The chart illustrates the safe percent of an upgrade on which the transmission deserve to be provided with miscellaneous chassis mounting angles. For example: if you have a 4-level transmission mounting angle, then 8 levels (or 14 percent of grade) is equal to the limit of 12 levels. If you have actually a 0-level mounting angle, the transmission can be operated on a 12 degree (21 percent) grade.Anytime the transmission operating angle of 12 levels is gone beyond for an extensive duration of time the transmission should be equipped with an oil pump or cooler kit to ensure proper lubrication.Note on the chart the result low oil levels have the right to have actually on safe operating angles. Allowing the oil level to autumn 1/2″ listed below the filler plug hole reduces the degree of grade by around 3 levels (5.5 percent).


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